Top surface of a gemstone setting



FIG. 1 is a perspective view of a top surface of a gemstone setting showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view, the rear elevational view being a mirror image; and,

FIG. 4 is a left side elevational view, the right side elevational view being a mirror image.

The broken line showing of faceting and a ring shank is shown for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a top surface of a gemstone setting, as shown and described. 